مشخصات پژوهش

صفحه نخست /Deep oxidative ...
عنوان Deep oxidative desulfurization by sulfated alumina catalyst using ferrate (Fe (VI)) oxidant derived from scrap iron
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها Oxidative desulfurizationو Ferrateو Scrap ironو Dibenzothiopheneو Super acid catalyst
چکیده A new efficient and environmentally friendly approach using ferrate (Fe (VI)) and SO42−/-Al2O3solid super-acid catalyst was proposed for deep oxidative desulfurization in this work.Fe (VI) was produced via electrolyzing of scrap iron as an affordable industrial feed. TheSO42−/-Al2O3catalysts were synthesized by impregnation method and then characterizedby XRF, XRD, BET, N2-adsorption desorption, SEM-EDX, FTIR, and NH3-TPD analysis. Rel-atively, impacts of reaction temperature and tetra butyl ammonium chloride (TBAC) as amass transfer agent on dibenzothiophene (DBT) oxidation ability of ferrate, was positive;however, a very more significant promotion in the ferrate performance was achieved usingthe SO42−/-Al2O3catalyst. It can be interpreted that acidic sites of this catalyst were benefi-cial for generating protonated ferrates as strong oxidant reagents. However, a high amountof sulfuric acid concentration during impregnation, was not in favor of its catalytic effects.It led to aggregation of sulfate over the catalyst surface which induced a low dispersionand decreased acidic sites. The best efficiency of DBT elimination by ferrate was found tobe 91.7% at temperature of 40◦C by 0.2 g/mL of SO42−/-Al2O3catalyst at 3 wt.% S loading.Accumulations of impurities on the catalyst during ODS reaction caused a slight reductionin the catalyst performance after 4 consecutive recycling.
پژوهشگران فرهاد بنی شریف (نفر چهارم)، اعظم اکبری (نفر سوم)، گلشن مظلوم گرمجانی (نفر دوم)، محبوبه نقوی (نفر اول)